An ultrasonic testing method was used to detect the fretting wear behavior of electrical connectors. The specimens used in this study were contacts of type-M round two-pin electrical connectors. The experiments consisted of running a series of vibration tests at different combined stress levels of frequencies and accelerations. During each experiment, through an electrical connector fretting wear ultrasonic detection device, the energy attenuation of ultrasound was monitored as a characteristic parameter, which is induced by the wear debris generated by the fretting wear of electrical connectors. The results show that vibration frequency, vibration acceleration, and vibration cycles all have a positive cumulative effect on debris generation on the contact surface of contacts. There is more debris accumulated in the root area of contact pins. The fretting surface is examined using a scanning electron microscope (SEM) and energy dispersive spectrometer (EDS) analysis to assess the surface profile, the extent of fretting damage, and elemental distribution across the contact zone, and the observed results are basically consistent with the ultrasonic test results.

中文翻译：

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超声波检测技术在电连接器微动磨损检测中的应用


采用超声波测试方法检测电连接器的微动磨损行为。本研究中使用的样本是 M 型圆形两针电连接器的触点。实验包括在不同的频率和加速度组合应力水平下运行一系列振动测试。在每次实验中，通过电连接器微动磨损超声波检测装置，监测超声波能量衰减作为特征参数，该能量衰减是由电连接器微动磨损产生的磨屑引起的。结果表明，振动频率、振动加速度和振动周期都对触点接触表面碎屑的产生具有积极的累积作用。接触针根部区域积聚的碎屑较多。使用扫描电子显微镜（SEM）和能谱仪（EDS）分析对微动表面进行检查，以评估表面轮廓、微动损伤程度以及接触区的元素分布，观察结果与实际情况基本一致。超声波检测结果。